Vtiger plugin suddenly stops passing data from Mautic to Vtiger

Your software
My Mautic version is:v2.14.2
My PHP version is: 7.2.34
My Database type and version is: MySQL 5.7.35-cll-lve

Your problem
My problem is: Vtiger plugin for Mautic stops passing data to Vtiger CRM leads module

These errors are showing in the log:

Steps I have tried to fix the problem:
Re-entered authentication access key and refresh access